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2019 Fiscal Year Annual Research Report

Exploring the origin of cosmic acceleration through weak lensing measurements of a Subaru wide-field galaxy survey

Publicly Offered Research

Project AreaWhy does the Universe accelerate? - Exhaustive study and challenge for the future -
Project/Area Number 18H04350
Research InstitutionNagoya University

Principal Investigator

宮武 広直  名古屋大学, 高等研究院(理), 特任助教 (20784937)

Project Period (FY) 2018-04-01 – 2020-03-31
Keywords観測的宇宙論 / 弱重力レンズ効果 / 銀河 / 宇宙の大規模構造
Outline of Annual Research Achievements

本研究の目的は、すばる望遠鏡新超広視野主焦点カメラHyper Suprime-Cam (HSC)によるすばる望遠鏡戦略枠サーベイのデータを用いた弱重力レンズ効果の測定を通して、世界最高精度で宇宙の加速膨張の性質に制限を付けることである。本年度は、昨年度に引き続き、Sloan Digital Sky Survey (SDSS) III / Baryon Oscillation Spectroscopic Survey (BOSS)の分光銀河カタログとHSCサーベイ初年度の銀河形状カタログを組み合わせることで、銀河自己相関関数と銀河弱重力レンズ効果を測定することで、宇宙論パラメータに制限を付けるための研究を主に行なった。モック信号を用いて高精度で宇宙論情報を引き出すための理論モデルを構築し、実際のデータを用いて、Dark Energy Surgey (DES), Kilo Degree Survey (KiDS)などの世界の他の競合するサーベイと同等もしくはそれ以上の精度で宇宙論を制限することが可能となった。本解析はブラインド解析を行っており、さらなる系統誤差のテストの後、次年度始めにはブラインドを取り去り、論文を執筆する予定である。
HSCサーベイ初年度の銀河形状カタログを用いた他の解析としては、高感度・高角度分解能マイクロ波望遠鏡PolarBearで測定された重力レンズ効果とHSCで測定された重力レンズ効果の相互相関を測定する研究を行った。
昨年度から行ってきた、HSCサーベイ3年目まで銀河形状カタログの作成は、画像解析に問題が見つかったため、サーベイ4年目までのデータを用いた新しい画像解析に基づいた作成を行った。系統誤差のテストはほぼ完了し、来年度始めには画像シミュレーションを用いた銀河形状の補正係数を求め、銀河形状カタログが完成する予定である。

Research Progress Status

令和元年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和元年度が最終年度であるため、記入しない。

  • Research Products

    (17 results)

All 2020 2019 Other

All Int'l Joint Research (6 results) Journal Article (4 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (7 results) (of which Int'l Joint Research: 5 results,  Invited: 2 results)

  • [Int'l Joint Research] Center for Computational Astrophysics/Cornell University/Princeton University(米国)

    • Country Name
      U.S.A.
    • Counterpart Institution
      Center for Computational Astrophysics/Cornell University/Princeton University
    • # of Other Institutions
      10
  • [Int'l Joint Research] University of KwaZulu-Natal(南アフリカ)

    • Country Name
      SOUTH AFRICA
    • Counterpart Institution
      University of KwaZulu-Natal
  • [Int'l Joint Research] University of Toronto(カナダ)

    • Country Name
      CANADA
    • Counterpart Institution
      University of Toronto
  • [Int'l Joint Research] Cardiff University/University of Cambridge/University of Oxford(英国)

    • Country Name
      UNITED KINGDOM
    • Counterpart Institution
      Cardiff University/University of Cambridge/University of Oxford
    • # of Other Institutions
      1
  • [Int'l Joint Research] Pontificia Universidad Catlica de Chile(チリ)

    • Country Name
      CHILE
    • Counterpart Institution
      Pontificia Universidad Catlica de Chile
  • [Int'l Joint Research]

    • # of Other Countries
      5
  • [Journal Article] Cosmological constraints from cosmic shear two-point correlation functions with HSC survey first-year data2020

    • Author(s)
      Hamana Takashi、Shirasaki Masato、Miyazaki Satoshi、Hikage Chiaki、Oguri Masamune、More Surhud、Armstrong Robert、Leauthaud Alexie、Mandelbaum Rachel、Miyatake Hironao、et al.
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 72 Pages: 16

    • DOI

      10.1093/pasj/psz138

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Tomographic galaxy clustering with the Subaru Hyper Suprime-Cam first year public data release2020

    • Author(s)
      Nicola Andrina、Alonso David、Sanchez Javier、Slosar Anze、Awan Humna、Broussard Adam、Dunkley Jo、Gawiser Eric、Gomes Zahra、Mandelbaum Rachel、Miyatake Hironao、Newman Jeffrey A.、Sevilla-Noarbe Ignacio、Skinner Sarah、Wagoner Erika L.
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 2020 Pages: 044~044

    • DOI

      https://doi.org/10.1088/1475-7516/2020/03/044

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Evidence for the Cross-correlation between Cosmic Microwave Background Polarization Lensing from Polarbear and Cosmic Shear from Subaru Hyper Suprime-Cam2019

    • Author(s)
      Namikawa T.、Chinone Y.、Miyatake H.、et al.
    • Journal Title

      The Astrophysical Journal

      Volume: 882 Pages: 62~62

    • DOI

      https://doi.org/10.3847/1538-4357/ab3424

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Dark Quest. I. Fast and Accurate Emulation of Halo Clustering Statistics and Its Application to Galaxy Clustering2019

    • Author(s)
      Nishimichi Takahiro、Takada Masahiro、Takahashi Ryuichi、Osato Ken、Shirasaki Masato、Oogi Taira、Miyatake Hironao、Oguri Masamune、Murata Ryoma、Kobayashi Yosuke、Yoshida Naoki
    • Journal Title

      The Astrophysical Journal

      Volume: 884 Pages: 29~29

    • DOI

      https://doi.org/10.3847/1538-4357/ab3719

    • Peer Reviewed / Open Access
  • [Presentation] Cosmological Constraints from Galaxy-galaxy Lensing and Clustering with the Subaru HSC and SDSS BOSS Data2020

    • Author(s)
      Hironao Miyatake
    • Organizer
      Cosmic Acceleration Conference
    • Int'l Joint Research
  • [Presentation] Weak Lensing Cosmology from Subaru Hyper Supreme-cam First Year Data2019

    • Author(s)
      Hironao Miyatake
    • Organizer
      6th Korea-Japan workshop on dark energy at KMI
    • Int'l Joint Research / Invited
  • [Presentation] Cosmological Constraints from Galaxy-galaxy Lensing and Clustering with the Subaru HSC and SDSS BOSS Data2019

    • Author(s)
      Hironao Miyatake
    • Organizer
      Subaru Telescope 20th Anniversary Conference
    • Int'l Joint Research
  • [Presentation] Cosmological Constraints from Galaxy-galaxy Lensing and Clustering with the Subaru HSC and BOSS Data2019

    • Author(s)
      Hironao Miyatake
    • Organizer
      LSST@ASIA
    • Int'l Joint Research
  • [Presentation] Unveiling the Dark Sector of the Universe with Subaru Hyper Suprime-Cam2019

    • Author(s)
      Hironao Miyatake
    • Organizer
      Future Perspective in Cosmology and Gravity
    • Int'l Joint Research / Invited
  • [Presentation] Weak Lensing Cosmology from the Subaru Hyper Suprime-Cam Survey First Year Data2019

    • Author(s)
      宮武広直
    • Organizer
      セミナー(千葉大学)
  • [Presentation] Weak Lensing Cosmology from the Subaru Hyper Suprime-Cam Survey First Year Data2019

    • Author(s)
      宮武広直
    • Organizer
      セミナー(京都大学)

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Published: 2021-01-27  

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